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airspeed (TAS)/Mach number. This information is displayed on the primary flight displays (PFDs)
and multifunction displays (MFDs).
Ice protection is provided by electric heating elements.
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−12
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AIR DATA SYSTEM (CONT'D)
Air Data Computers (ADCs)
The ADCs are digital, microprocessor-controlled units. The two ADCs receive on-side pitot and
static air pressure information from the pitot-static system, and air temperature information from
the TAT probe.
The ADCs also receive operator/display selected input from the ADRPs and the automatic flight
control system (AFCS). From these inputs, the ADC calculates all necessary air data parameters,
and transmits the information to the applicable systems.
Air Data Calculations
The ADC calculates air data parameters for the following:
• Pressure altitude (corrected for static-port pressure errors)
• Barometric corrected altitude (inches of mercury or hectopascals)
• Vertical speed
• Indicated airspeed (IAS)/calibrated airspeed (CAS)
• Mach number
• Maximum airspeed (VMO/MMO)
• True airspeed (TAS)
• Static air temperature (SAT)
• Total air temperature (TAT)
Air Data Computations
The ADC computes data for the following:
• Preselect altitude
• Vertical speed reference
• Airspeed reference
• Mach reference
• IAS trend vector
• Secondary speed reference (V1, VR, V2 and VT)
• Flap overspeed limits (231, 197 and 189 kts)
Air Data Transmission
The ADC sends the computed air data to the following systems and components:
• Flight data recorder (FDR)
• Radio tuning unit (RTU)
• Mode S transponder
• Traffic alert and collision avoidance system (TCAS)
• Primary flight display (PFD)/multifunction display (MFD)
• AFCS
• IRSs
• DCUs
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−13
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AIR DATA SYSTEM (CONT'D)
• Ground proximity warning system (GPWS)
• Horizontal stabilizer trim control unit (HSTCU)
• Stall protection computer
• Flap electronic control unit (FECU)
CONTROLS AND INDICATORS
Display Control Panel
The DCP provides the pilot and the copilot with the controls needed to select the desired
navigational features of the EFIS system. For the PFDs, this includes lateral and vertical
navigation source information and bearing pointers. For the MFDs, this includes the format, range
and display overlays. Each MFD/PFD pair has a dedicated DCP. If one of the DCPs should fail,
the other DCP may be used to control both EFIS displays.
Format/Range Knob
Turning the (outer) FORMAT knob selects a desired on-side MFD display format for the
associated MFD. There are five selectable display formats: HSI, NAV sector, FMS map, plan
map and TCAS. The (inner) RANGE knob varies the display range scale on the MFD.
Navigation Source Knob
The NAV SOURCE knob selects the active navigation source. This action controls the selection
of displayed information on each pilot’s PFD/MFD. Possible selections are FMS 1, VOR 1 (or
LOC 1), VOR 2 (or LOC 2), FMS 2 and FMS 3 (if installed). Pushing the center of the knob
alternatively adds or removes cross-side NAV data on the MFD HSI and NAV sector displays
only.
Bearing Pointers
The single-bar BRG pointer selects the No. 1 bearing pointer for each pilot’s PFD/MFD.
Possible selections are VOR 1, ADF 1, FMS 1, and FMS 3 (if installed). The double-bar BRG
pointer selects the No. 2 bearing pointer for each pilot’s PFD/MFD. Possible selections are VOR
2, ADF 2, FMS 2, and FMS 3 (if installed).
Information Overlay Buttons
The WX button selects weather radar and lightning detection system depictions on the MFD.
This button sequentially selects weather radar information, or adds radar/lightning overlays. The
weather radar is available on all dynamic map MFD formats, but is not available for HSI and
plan map. The TFC button alternately selects or deselects the TCAS traffic map overlay display
on the associated MFD. The TERR button selects the terrain information and replaces the
weather radar information. For more details about terrain overlay information, see the EGPWS
section in Chapter 17, Navigation Systems.
FLIGHT INSTRUMENTS
Description
Vol. 2 11−10−14
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
　
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